Re: Best auto trans for Cummins?
1972K20 - I am running a 4L80 behind a 24 Valve VP that is stock and a NP205 TC. I only have a little over 200 miles on it so far but it seems to work nice so far. I still haven't pulled anything with it because I need to put a GN hitch in it first. My 4L80 is all stock and I was told it came out of diesel suburban. You have to rev it up a little more than I am used to when you take off from a stop but it shifts smooth.
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1987 GMC R2500 SC 454 T400
1988 Chevy R30 CC DRW 12 valve Cummins NV4500 GearVendors
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